The Pareto Principle, or the 80/20 rule, is often represented by a Pareto chart, which is used to prioritize issues by showing the most significant factors. CompTIA Project+ recommends Pareto analysis as a valuable tool for quality control and decision-making.

Explanation
Assess the impact of the request and create a change request. The project manager should assess the impact of the request and create a change request in response to the stakeholder asking to add mobile device functionality to a project that is on track to be completed under budget and ahead of schedule. A change request is a document that formally proposes and records a modification or addition to some aspect of a project, such as scope, schedule, cost, quality, or resources. A change request can help to communicate and justify the need and rationale for the change and its implications on the project objectives and deliverables. A change request also helps to initiate the change control process, which involves reviewing, approving, implementing, and monitoring the change12

A contingency plan is a risk mitigation strategy that involves preparing alternative courses of action in case the
original plan fails or encounters unexpected problems. A contingency plan can help reduce the impact of
negative risks and ensure the project continuity and success. In this case, the project manager should develop a
contingency plan to mitigate the risk of hurricanes affecting the implementation of the new radar system. For
example, the contingency plan could include backup resources, alternative locations, emergency procedures,
and communication channels in case of a hurricane. References = CompTIA Project+ Study Guide: Exam
PK0-005, 3rd Edition, Chapter 7: Risk Management1; CompTIA Project+ Certification Study Guide, 3rd
Edition, Chapter 7: Risk Management

A statement of work (SOW) is a formal document that defines the entire scope of work involved for a vendor and clarifies deliverables, costs, and timeline1. It serves as a contractual agreement between a vendor and a client, providing a comprehensive description of the work to be performed2. A reason to use a SOW on a project is to ensure the team stays within the scope of the contract, as it outlines what the team will and won't do on a project, saving from painful client negotiations and protecting the timeline and the bottom line3. Reference = CompTIA Project+ PK0-005 Certification Study Guide, Chapter 3: Initiating Projects Part 1, page 63; What Is a Statement of Work? Definition & Examples, Introduction and What Is a Statement of Work (SOW) In Project Management? sections; Statement Of Work Ultimate Guide: Simple Definition & Template, Introduction and What is a Statement of Work? sections; What Is a Statement of Work (SOW)? - Coursera, Introduction section.

Using the chat and plain language can help overcome the communication barriers caused by accents and
background noises. Chat allows team members to write down their ideas and questions, which can be easier to
understand than spoken words. Plain language reduces the ambiguity and complexity of the messages, making
them more clear and concise. These techniques can also enhance the participation and engagement of the team
members, as they can express their thoughts and opinions more comfortably and confidently. References =
CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter 4: Communication and Change
Management, p. 97-98.